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See detailMind-wandering and attentional control: two sides of the same coin or independent processes?
Stawarczyk, David ULg; Majerus, Steve ULg; D'Argembeau, Arnaud ULg

Conference (2012, May 11)

Mind-wandering refers to the occurrence of thoughts whose content is both unrelated to the task that we are currently carrying out and decoupled from current sensory perceptions (e.g., having our mind ... [more ▼]

Mind-wandering refers to the occurrence of thoughts whose content is both unrelated to the task that we are currently carrying out and decoupled from current sensory perceptions (e.g., having our mind distracted by past memories or future concerns when reading a novel). Recent frameworks suggest that the occurrence of mind-wandering reflects temporary breakdowns in attentional control processes. Other proposals however consider that mind-wandering is a cognitive process of its own, independent of attentional control. Based on the dual mechanisms of control framework (Braver et al., 2007), we examined whether proactive and reactive attentional control processes (measured with the A-X Continuous Performance Test), as well as working memory capacity (WMC), are related to the occurrence of mind-wandering during the Sustained Attention to Response Task (SART). Results showed that WMC was positively related to proactive but not reactive control, while the frequency of mind-wandering was unrelated to these three measures of attentional control. Additionally, we found that proactive control, reactive control, WMC, and mind-wandering contributed significantly and independently to the prediction of commission errors during the SART. These results suggest that mind-wandering is not the mere reflection of attentional control abilities and that these two factors have separate influences on task performance. [less ▲]

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See detailSymposium on the impact and role of the psychological traumatism and forensic evaluation on victimization process
Blavier, Adelaïde ULg

Conference (2012, May 11)

This symposium aims to discuss and increase the comprehension of victimization process through the psychological traumatism, revictimization and the forensic assessment. It addresses a relevant ... [more ▼]

This symposium aims to discuss and increase the comprehension of victimization process through the psychological traumatism, revictimization and the forensic assessment. It addresses a relevant contemporary issue for clinical psychology and more generally for the society (as partner violence, forensic patients and forensic assessment). Moreover, this symposium will be also the occasion to extend the discussion to the psychological traumatism among workers in police. This last contribution will explain how workers in emergency situations are able or can be helped to manage their stress in order to prevent psychological traumatism. [less ▲]

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See detailVerbal short-term memory deficits in children with specific language impairment: impact of linguistic complexity and attentional control
Leclercq, Anne-Lise ULg; Maillart, Christelle ULg; Genet, Océane ULg et al

Conference (2012, May 11)

Children with specific language impairment (SLI) constantly show poor performance in verbal short term memory (STM) tasks. However, the precise mechanism at the root of this problem is still unclear ... [more ▼]

Children with specific language impairment (SLI) constantly show poor performance in verbal short term memory (STM) tasks. However, the precise mechanism at the root of this problem is still unclear. Verbal STM tasks, such as nonword repetition, are complex tasks recruiting linguistic and non linguistic abilities. Recent studies emphasize the role played by attentional capacities in verbal STM performances (e.g., Majerus, Bastin, et al., 2007; Majerus, Heiligenstein, et al., 2009; Majerus, Poncelet, et al., 2006). Moreover, a number of studies have demonstrated an impact of linguistic knowledge on verbal STM (e.g., Majerus & van der Linden, 2003). In the light of these developments, two studies re-explored the nature of verbal STM deficits in children with SLI by assessing the impact of attentional capacity and linguistic complexity. The first study assessed the impact of attentional capacities on STM via a nonverbal dual-tasking paradigm in children with SLI, in children matched on age, and in children matched on STM span. The second study assessed the impact of lexical, perceptual and phonological variables on STM performance in children with SLI, in children matched on age, and in children matched on vocabulary knowledge. We will show that neither the attentional nor the linguistic complexity accounts can satisfactorily explain the verbal STM deficits observed in children with SLI. [less ▲]

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See detailDesign of sugar-based surface active agents for emulsion polymerization in supercritical carbon dioxide
Boyère, Cédric ULg; Favrelle, Audrey; Broze, Guy ULg et al

Conference (2012, May 10)

The use of aqueous dispersed media, such as emulsions, has many advantages over solution processes for chemical transformations and polymerization reactions, i.e. limited environmental impact, ease of ... [more ▼]

The use of aqueous dispersed media, such as emulsions, has many advantages over solution processes for chemical transformations and polymerization reactions, i.e. limited environmental impact, ease of products recovery and increased reaction rate. Emulsions are usually implemented from a water/organic solvent mixture in the presence of a surfactant. However, supercritical carbon dioxide (scCO2) (Pc =74 bars; Tc = 31°C) constitutes an interesting alternative to the traditional organic solvents in these heterogeneous systems because it is inexpensive, non-toxic, non-inflammable and environmentally friendlier. In this context, we developed a novel class of surfactants for the stabilization of H2O/scCO2 emulsions, i.e. fluorinated modified carbohydrates. The hydrophilic head of the surfactant consists in a sugar moiety whereas a fluorinated tail is specifically located in the scCO2 phase. The strategies for the synthesis of these carbohydrates esters rely on selective lipase-catalyzed modifications of sugars and on the versatile thiol-Michael addition reaction. The ability of these molecules to decrease the H2O/scCO2 interfacial tension and to stabilize such emulsions will be presented. Finally, high internal phase scCO2-in-water emulsion (HIPE) were prepared with these new surfactants and used as template for the acrylamide polymerization. The monomer is polymerized in the continuous aqueous phase before removing the CO2 droplets (at least 70 % of the total volume). The resulting permeable porous polymers, called polyHIPEs, exhibit highly interconnected voids (cfr SEM picture) and should be valuable in many applications including support for catalyst, filtration process, immobilization of proteins, etc. [less ▲]

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See detailVisual memory of central and marginal items in natural and complex scenes: influence of subjects’ expertise in road traffic.
Blavier, Adelaïde ULg; Montagnino, Cédric; Nyssen, Anne-Sophie ULg

Conference (2012, May 10)

Our purpose is to study the visual memory (VM) of natural complex scenes in function of subjects’ expertise. 15 subjects were divided into 3 groups according to their level of driving expertise (novices ... [more ▼]

Our purpose is to study the visual memory (VM) of natural complex scenes in function of subjects’ expertise. 15 subjects were divided into 3 groups according to their level of driving expertise (novices, <5 years and >5 years of experience) and were asked to memorize road images (divided into 3 levels of complexity). After each image presentation (5 second presentation), subjects were asked to answer 6 questions, 3 about central information for driving and 3 about marginal items (not relevant for driving) and to estimate their self-confidence. Our results showed an effect of detail type, subjects’ expertise and stimulus complexity: performance was significantly better for central items than for marginal information, for less complex images than for more complex images and with experts (level 2 and 3) than novices (level 1). We observed no interaction between these 3 variables (detail type, image complexity and subjects’ expertise). This finding suggests difference between central and marginal information in VM performance is stable independently of the image complexity and subjects’ expertise. It generalizes results from our previous study with experts in art history and from Melcher’s study (2006) that showed difference between central and marginal information was stable independently of stimulus presentation duration. [less ▲]

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See detailAn EOF-based technique to compute merged high resolution sea surface temperature fields
Alvera Azcarate, Aïda ULg; Troupin, Charles ULg; Barth, Alexander ULg et al

Conference (2012, May 10)

High quality sea surface temperature (SST) data sets are needed for various applications, including numerical weather prediction, ocean forecasting and climate research. The coverage, resolution and ... [more ▼]

High quality sea surface temperature (SST) data sets are needed for various applications, including numerical weather prediction, ocean forecasting and climate research. The coverage, resolution and precision of individual SST satellite observations is not sufficient for these applications, therefore the merging of these complementary data sets is needed to reduce the final data set error. This is usually performed by optimal interpolation (OI).We present an extension of the capabilities of DINEOF (Data INterpolating Empirical Orthogonal Functions) to merge data from different platforms. The analysis is based on the formalism of OI, but the crucial difference is that the error covariance is not parametrized a priori using an analytical expression, but expressed using a spatial EOF basis calculated by DINEOF. This EOF basis represents more realistically the complex variability of SST data sets than the parametric covariance used in most OI applications. An example will be presented using data from a polar-orbiting satellite (AVHRR on MetOp) and a geostationary satellite (SEVIRI on MSG). The high spatial resolution of the polar-orbiting satellite and the high temporal resolution of the geostationary satellite are retained to create a very high spatial and temporal resolution field of the western Mediterranean SST. The results are validated with independent data. [less ▲]

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See detailThe relationship between vocal abilities and singing accuracy
Larrouy, Pauline ULg; Hutchins, Sean; Peretz, Isabelle

Conference (2012, May 10)

Poor-pitch singing could be caused by poor pitch perception or poor vocal-motor control abilities. This study aims to contrast these two possible causes in order to determine the role of vocal control on ... [more ▼]

Poor-pitch singing could be caused by poor pitch perception or poor vocal-motor control abilities. This study aims to contrast these two possible causes in order to determine the role of vocal control on the accuracy of sung performances among nonmusicians. Participants matched recordings of their own voices either by singing, or by manipulating those recordings on a physical instrument which could control the pitch of the vocal recording playback by sliding the finger along a position sensor. In addition, participants sang a full song from memory. Overall, participants were more accurate at matching the pitch of the original recording with the instrument than with their voice. In addition, singers who were more accurate at vocal pitch matching tended to have better vocal quality (as assessed through standard measurements, e.g. jitter, stability), and were better at singing whole songs. This pattern of results confirms that vocal-motor control, rather than pitch perception ability, is the primary driver of singing ability, and provides insight into the relationship between pitch accuracy and vocal quality. [less ▲]

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See detailDe la condition des femmes dans l’Église au XIIIe s.
Henneau, Marie-Elisabeth ULg

Conference (2012, May 10)

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See detailValuation and evaluation (panel discussion)
Halleux, Jean-Marie ULg

Conference (2012, May 10)

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See detailThe benefits of prior sequence learning on a serial reaction time performance in Alzheimer's disease: Comparison of two learning methods
Schmitz, Xavier ULg; Bier, Nathalie; Joubert, Sven et al

Conference (2012, May 10)

It is well known that patients with Alzheimer's disease (AD) are able to acquire new perceptual-motor skills (e.g., Rouleau et al., 2002). However, implicit learning methods should be favored, because ... [more ▼]

It is well known that patients with Alzheimer's disease (AD) are able to acquire new perceptual-motor skills (e.g., Rouleau et al., 2002). However, implicit learning methods should be favored, because they reduce the intervention of controlled processes related to working memory (Van Halteren-Van Tilborg, 2007). We compared two learning methods (implicit vs. declarative) of a perceptual-motor sequence in 12 patients with AD and 12 healthy older adults. In the implicit learning condition, subjects were simply asked to perform the sequence several times by pushing on the keyboard key corresponding to the stimulus on the screen. In the declarative condition, subjects learned the sequence by trial-and-error. The impact of the two methods was compared in a subsequent serial reaction time task, in which subjects had to respond as quickly as possible to the previously learned sequence. Results show that prior implicit learning is effective in both groups (p<.05). In contrast, in the declarative condition, while the two groups showed improving performance during the learning phase (p<0.01), only the control group benefits from this knowledge during the SRT task (p<0.01). In conclusion, our results show preserved perceptual-motor learning in AD when the method induces the intervention of non-declarative, automatic memory processes. [less ▲]

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See detailJoseph Citrouillard et Le Tintamarre : une sérialité double
Saint-Amand, Denis ULg

Conference (2012, May 10)

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See detailDevelopment of near infrared spectroscopic methods using desirability indexes: How to select the most appropriate calibration model
Ziemons, Eric ULg; De Bleye, Charlotte ULg; Chavez, Pierre-François ULg et al

Conference (2012, May 10)

In the last decade, considerable research and developments dealing with near infrared spectroscopy (NIRS) have taken place in industrial field, especially in pharmaceutical industry. This enthusiasm can ... [more ▼]

In the last decade, considerable research and developments dealing with near infrared spectroscopy (NIRS) have taken place in industrial field, especially in pharmaceutical industry. This enthusiasm can be explained by the fact that NIRS is regarded as promising and attractive tool in Process Analytical Technology (PAT) and Green Chemistry frameworks. Taking into account its non-invasive, non-destructive character, fast data acquisition and the use of probes in on-line, in-line and at-lines, this technique is expected to reach the aims of the latters. However, the development of a NIR quantitative method is not straightforward in comparison with conventional analytical techniques. Its development requires time-consuming reference methods, chemometrics and iterative heuristic approaches to build a model allowing the prediction of the analyte of interest according to the acceptance criteria consistent with the intended use of the method. Facing to the lack of objective decision rule of the traditional chemometric criteria such as R2, RMSEC, RMSECV and RMSEP, it is essential to develop innovative approaches for the selection of the most appropriate calibration model from a models plurality. In this context, a methodology using desirability indexes, such as the Fitting Model Index (FMI), based on tolerance intervals was developed in order to increase significantly the objectivity of the decision process. This latter allows to reduce dramatically the development and the validation steps and thus could ease the implementation of NIR spectroscopy in pharmaceutical industry. [less ▲]

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See detailReconstruction of Total Suspended Matter data over the North Sea using DINEOF: use of the Gaussian anamorphosis transformation
Alvera Azcarate, Aïda ULg; Neukermans, Griet; Barth, Alexander ULg et al

Conference (2012, May 10)

Total Suspended Matter (TSM) from the SEVIRI sensor in the North Sea will be analysed using DINEOF (Data INterpolating Empirical Orthogonal Functions), an EOFbased technique to reconstruct missing data ... [more ▼]

Total Suspended Matter (TSM) from the SEVIRI sensor in the North Sea will be analysed using DINEOF (Data INterpolating Empirical Orthogonal Functions), an EOFbased technique to reconstruct missing data. The information needed to reconstruct the missing data is computed internally based on a truncated EOF basis, so no assumptions about the statistics of the data have to be made. DINEOF uses the mean and covariance of the original data to calculate the EOF basis. If the data are normally distributed, then the probability density distribution can be completely described by their mean and the eigenvectors of the covariance matrix (the EOFs). Variables such as TSM, however, do not have a Gaussian distribution, since TSM is never smaller than zero. DINEOF typically does not take this into account. To overcome this, a logarithmic transformation is usually performed to non-Gaussian variables, although the exponential transformation needed to retrieve the original variable units after using DINEOF leads sometimes to unrealistic high values in the reconstruction. An empirical transformation, which allows to obtain a normally distributed variable based solely on the data themselves, will be applied. This procedure, called Gaussian anamorphosis, is sometimes used in data assimilation. A Gaussian anamorphosis transformation will be applied to the TSM data of the North Sea prior to their reconstruction. The high spatial and temporal dynamics of the gapfree geostationary TSM data set will be analysed, focusing on tidal dynamics and sub-daily variability. [less ▲]

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See detailThe eco-neighborhoods, an alternative to urban sprawl?
Halleux, Jean-Marie ULg

Conference (2012, May 10)

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See detailStimuli-responsive magnetic nanohybrids designed for controlled drug release application
Liu, Ji ULg; Detrembleur, Christophe ULg; Mornet, Stephan et al

Conference (2012, May 10)

Stimuli-responsive organic/inorganic nanohybrids, with an inorganic core and a polymer coating, have been frequently suggested as a promising vehicle for drug or gene delivery and also controlled release ... [more ▼]

Stimuli-responsive organic/inorganic nanohybrids, with an inorganic core and a polymer coating, have been frequently suggested as a promising vehicle for drug or gene delivery and also controlled release, due to their outstanding biocompatibility, versatile surface modification, specific responsive properties to external stimuli, and so on. Magnetic nanoparticles have various applications in biomedical filed, such as magnetic resonance imaging, biosensors, magnetic separation, drug release, hyperthermia therapy and so on. Poly (acrylic acid) copolymers exhibit a sharp conformation transition when exposed to external change in pH. The PAA copolymer was used to form a polymer shell outside the magnetic core, a cationic dye was uploaded by electro-static interaction. The controlled release was achieved by tuning the external pH value. Magnetic/SiO2 mesoporous nanoparticles were prepared as another drug vehicle, in order to obtain a higher drug loading amount. Crystalline molecules were utilized as a gate keeper to control the release of drugs uploaded. [less ▲]

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See detailLa planification comme procédure performative
Semal, Nathalie ULg

Conference (2012, May 09)

La planification comme énonciation d’un programme d’action à réaliser est au cœur des processus d’organisation et de leur normalisation. Souvent associée à la notion de formalisation rationalisatrice, la ... [more ▼]

La planification comme énonciation d’un programme d’action à réaliser est au cœur des processus d’organisation et de leur normalisation. Souvent associée à la notion de formalisation rationalisatrice, la planification est aussi porteuse d’une injonction à communiquer. Elle n’exclut pas les situations d’interactions et d’ajustement en face à face ni les pratiques discursives. Bien au contraire, elle repose sur l’articulation de plusieurs formats d’information, de registres d’action et de régimes d’engagement. Basée sur une enquête de type ethnographique menée au cours d’une recherche doctorale, la présente communication s’attache à décrire en quoi ils participent à la mise en convergence d’agencements sociotechniques qui incluent et contribuent à la performance de ce programme d’action. [less ▲]

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See detailTowards a Trade Control Model: The EU Approach
Michel, Quentin ULg

Conference (2012, May 09)

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See detailSarapis et Neôtera élus parmi les dieux sur une plaque en bronze provenant du Cabinet de Francesco Bianchini
Veymiers, Richard ULg

Conference (2012, May 09)

Une plaque de bronze ayant appartenu à Francesco Bianchini, cet érudit et savant véronais qui fut président des antiquités de Rome au début du XVIIIe siècle, est signalée comme « talismanique gnostique » ... [more ▼]

Une plaque de bronze ayant appartenu à Francesco Bianchini, cet érudit et savant véronais qui fut président des antiquités de Rome au début du XVIIIe siècle, est signalée comme « talismanique gnostique » dans le Catalogue des bronzes antiques de la Bibliothèque nationale publié à Paris en 1895 par Ernest Babelon. Un réexamen de cet objet, sans doute monté en bracelet, permet d’y voir plutôt un témoignage de type « mégathéiste » des II-IIIe siècles apr. J.-C. qui magnifie par acclamation certaines figures divines, en l’occurrence Sarapis et Neôtera, tout en les maintenant par l’image dans un monde divin pluriel. [less ▲]

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See detailInterannual variability of Black Sea’s hydrodynamics and connection to atmospheric patterns
Capet, Arthur ULg; Barth, Alexander ULg; Beckers, Jean-Marie ULg et al

Conference (2012, May 09)

The long term variability (1962–2000) of the Black Sea physical processes (e.g. temperature, main circulation, cold intermediate layer, sea level) and its relation to atmospheric conditions and large ... [more ▼]

The long term variability (1962–2000) of the Black Sea physical processes (e.g. temperature, main circulation, cold intermediate layer, sea level) and its relation to atmospheric conditions and large scale climate patterns are investigated using an eddy-resolving tridimensional model in combination with statistical tools (e.g. Empirical Orthogonal Functions, Self Organizing Maps). First, the ability of the model to represent the interannual dynamics of the system is assessed by comparing the modeled and satellite sea surface temperature (SST) and sea level anomaly (SLA) decomposed into their dominant Empirical Orthogonal Functions (EOFs). The correlation between the spatial and temporal EOFs modes derived from model and satellite data is usually satisfactory and this gives some confidence in using the model as a tool to investigate not only the SST and SLA dynamics but also the dynamics of connected variables. Then, the long term variability (1962–2000) of the Black Sea hydrodynamics is assessed by decomposing into their dominant EOFs modeled SST, SLA and selected key hydrodynamical variables associated to the main circulation and vertical structure of the water column. Significant correlations between the EOFs associated to these variables are investigated in order to link the variability of surface fields and the internal dynamics of the system. In particular, the intensity of the general cyclonic circulation (the Rim Current) is shown to impact strongly (1) the mean sea level, (2) the SST response to air temperature (AT), (3) the formation of the cold intermediate layer, (4) the meridional repartition of the SST anomaly and (5) the exchanges of heat between the north-western shelf and the open basin. In order to appraise the variability of atmospheric conditions over the Black Sea during 1962–2000 and their role in driving the hydrodynamics, a self-organizing maps technique is used to identify spatial recurrent patterns of atmospheric fields (i.e., AT, wind stress and curl). The impact on these patterns of large scale climatic variability over the north Atlantic and Eurasia (estimated by respectively the north Atlantic oscillation (NAO) and the east Atlantic/west Russia oscillation (EA/WR) indexes) is assessed. Distinct time scales of influence of the large scale teleconnection patterns on the AT are identified: EA/WR drives the short scale (1–5 years) variations of SST, while the long term (4-5 years) trends of the NAO drive the long term SST trends. The drastic changes that have occurred in the Black Sea deep sea ecosystem at the end of the 80s are connected to an intensification of the general circulation that has promoted an export of riverine materials from the eutrophicated north-western shelf to the deep sea. Finally, in the last two decades, we find an increased duration of persistent atmospheric anomalies regime that has the potential to drive the system away from its average state as occurred in the late 80s. If persistent in the future, such long lasting atmospheric anomalies may have a significant impact on the ecosystem functioning. [less ▲]

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See detailEstimating pCO2 from remote sensing in the Belgian Coastal Zone
Borges, Alberto ULg; Ruddick, K.; Harlay, Jérôme ULg

Conference (2012, May 09)

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See detailTra magico e sacro: Serapide su gemme e gioielli antichi
Veymiers, Richard ULg

Conference (2012, May 08)

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See detailToward the end of EU-Mercosur Interregionalism?
Santander, Sébastian ULg

Conference (2012, May 08)

Since the early nineties regionalism has been a key element in the relations between Europe and South America. The EU has offered to Mercosur direct support based on its own integration experience. It has ... [more ▼]

Since the early nineties regionalism has been a key element in the relations between Europe and South America. The EU has offered to Mercosur direct support based on its own integration experience. It has become an external unifier for South American regionalism and Mercosur has considered the EU as a reference. The EU and Mercosur have planed to establish an ambitious interregional Association agreement. However, since the beginning of the twenty first century the interregional relationship is going through a period of uncertainties. Several factors are affecting it such as the incoherence of the EU policy and the EU-Brazil partnership as well as the loose of EU influence combined with the political radicalism and economic nationalism in South America. [less ▲]

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See detailAbout Generic Properties of "Nowhere Analyticity"
Bastin, Françoise ULg; Nicolay, Samuel ULg; Esser, Céline ULg

Conference (2012, May 08)

A infinitely differentiable function f is is analytic at a point x if its Taylor series at this point converges to f on an open neighbourhood of x; if this is not the case, f has a singularity at x. A ... [more ▼]

A infinitely differentiable function f is is analytic at a point x if its Taylor series at this point converges to f on an open neighbourhood of x; if this is not the case, f has a singularity at x. A function with a singularity at each point of the interval is called nowhere analytic on the interval. In this talk, we show that the set of nowhere analytic functions is prevalent in the Frechet space C([0;1]). We get then a deeper result using Gevrey classes. [less ▲]

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See detailGestion de l'environnement: améliorer la pertinence scientifique et technique des décisions négociées
Sitti, Anani Hudema ULg

Conference (2012, May 07)

Since the first international Earth Summit (held in Rio de Janeiro in 1992) a new kind of management of environmental issues is arising: the participative management, also called “participation”. Indeed ... [more ▼]

Since the first international Earth Summit (held in Rio de Janeiro in 1992) a new kind of management of environmental issues is arising: the participative management, also called “participation”. Indeed, the Rio Declaration on Environment and Development stated in principle10 that: "Environmental issues are best handled with participation of all concerned citizens, at the relevant level". After two decades of practice, the first assessments of the participative management are however rather disappointing: while the process of participation is supposed to improve the quality of decisions, several authors noticed - mostly - an opposite effect. To contribute to improve the integration of the scientific dimension in the negotiated agreements, we tried to identify the factors which influence the scientific and technical relevance of the negotiated decisions thanks to a method of qualitative modelling called “System dynamics”. [less ▲]

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See detailAbout the Regularity of Cantor's Bijection
Simons, Laurent ULg; Nicolay, Samuel ULg

Conference (2012, May 07)

Multifractal analysis has been introduced in the context of turbulence. Some tools have been developed to study the solutions of some PDEs. In this talk, we will examine the regularity of Cantor's ... [more ▼]

Multifractal analysis has been introduced in the context of turbulence. Some tools have been developed to study the solutions of some PDEs. In this talk, we will examine the regularity of Cantor's bijection between the irrational numbers of the unit interval [0,1] and the irrational numbers of the unit square [0,1]^2. We will particularly show that its H older exponent is equal to 1/2 almost everywhere (with respect to the Lebesgue measure). [less ▲]

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See detailCes tendinopathies qui nous submergent
Kaux, Jean-François ULg

Conference (2012, May 05)

Des traitements conservateurs classiques ( AINS, infiltrations, rééducation excentrique) aux nouveaux traitements ( ondes de choc, concentrés plaquettaires, …) . Chirurgie. Particularités de l’épaule.

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See detailComportement élastique des articulations flexibles à col elliptique
Debongnie, Jean-François ULg

Conference (2012, May 04)

We present here amodel for the prediction of the elastic behaviour of elliptic notch hinges, including bending and shear in both planes, stretching and torsion. In a first step, an exact solution is ... [more ▼]

We present here amodel for the prediction of the elastic behaviour of elliptic notch hinges, including bending and shear in both planes, stretching and torsion. In a first step, an exact solution is established in the frame of the beam theory, making use of Sommerfeld's change of variable, which is well known in the lubrication theory. The second step is the deduction of the asymptotic solution for very thin hinges. Finally, and yhis is the most original part of our presentation, a simple corrective factor is deduced numerically, which enables to pass from the asymptotic solution to the exact one with a fair approximation in the practical range of thicknesses. <the simplicity of the obtained model has no equivalent in the literature, which is specially useful at the design stage. [less ▲]

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See detailLe feu. L'incendie purificateur
Close, Florence ULg

Conference (2012, May 04)

La nuit du 3 au 4 août 1312, la collégiale Saint-Martin est livrée aux flammes, condamnant à une mort certaine les Patriciens de la Cité qui y avaient trouvé refuge. Cet incendie demeure dans la mémoire ... [more ▼]

La nuit du 3 au 4 août 1312, la collégiale Saint-Martin est livrée aux flammes, condamnant à une mort certaine les Patriciens de la Cité qui y avaient trouvé refuge. Cet incendie demeure dans la mémoire liégeoise, le violent symbole du coup d’arrêt des prétentions de domination des « petits » par les « grands » non sans susciter nombre d’interrogations quant aux raisons et motivations de ce geste assassin. Les incendiaires ne pouvaient n’avoir mesuré l’ampleur des conséquences de leur acte ; l’incendie volontaire était, depuis l’Antiquité, considéré au nombre des crimes les plus graves. Ravageur et destructeur, le feu était aussi purificateur, tant pour les métaux précieux que pour les âmes. C’est à cette double nature paradoxale du feu – symbole de pureté, de perfection autant que de malheur et de destruction –, à son action redoutable, à son image et à sa symbolique juridique et spirituelle au haut moyen âge et au moyen âge central qu'était consacrée cette communication. [less ▲]

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See detailInvestigation of Structure-Fundamental/Functional Property Relationships of (Bio)-surfactants for a Rational Design of their Preparation and Use in Food and Non-food applications
Razafindralambo, Hary ULg

Conference (2012, May 01)

(Bio)-surfactants are among the most versatile compounds in our planet, either in nature or in biological systems, as well as in manufactured products. Increasing knowledge on the relationships between ... [more ▼]

(Bio)-surfactants are among the most versatile compounds in our planet, either in nature or in biological systems, as well as in manufactured products. Increasing knowledge on the relationships between their structure, fundamental properties, and functionalities in simple, and thereafter in more complicated models, are therefore the key factor on their rational preparation and use for any applications. In the present communication, the effect of different structural entities of (bio)surfactants, especially Carbohydrate-based amphiphilic compounds, including monomeric, oligomeric, and polymeric surfactants, on their interfacial properties at short time (under dynamic conditions) and long time (at the equibrium), and the impact of such fundamental properties through physico-chemical parameters on the formation and stability of colloidal systems (micelles, foams, emulsions) will be presented. Some perspectives in their applications will be discussed. [less ▲]

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See detailSpatial attention in working memory
Anseeuw, B.; Van Dijck, P.; Majerus, Steve ULg et al

Conference (2012, May)

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See detailModulating effect of COMT genotype on the brains regions underlying inhibition
Jaspar, Mathieu ULg; Grandjean, Julien ULg; SALMON, Eric ULg et al

Conference (2012, May)

Catechol-O-methyltransferase (COMT) is an important enzyme which degrades catecholamines, such dopamine, notably in the prefrontal cortex (Männistö & Kaakkola, 1999). A large number of studies reported an ... [more ▼]

Catechol-O-methyltransferase (COMT) is an important enzyme which degrades catecholamines, such dopamine, notably in the prefrontal cortex (Männistö & Kaakkola, 1999). A large number of studies reported an effect on executive functioning of COMT genotype (Barnett & al., 2007), each genotype being associated with a different COMT enzymatic activity (Weinshilboum & al., 1999). In an event-related fMRI study, a modified form of the Stroop task was administered to 45 young adults separated in three groups according to their COMT val158met genotype : 15 homozygous val/val (VV), 15 homozygous met/met (MM) and 15 heterozygotes val/met (VM). Both behavioral and fMRI results indicated the presence of a general interference effect consistent with prior reports (Nee & al., 2007). More interestingly, group comparisons indicate that this effect is associated, for a similar behavioral performance, with increased medial frontal and precentral gyrus activity in VV and VM groups by comparison with MM group. Conversely, no supplementary brain areas were observed for the comparison of the MM to the two other groups. These observations, paralleling with the lower COMT enzymatic activity and, thus, the higher cortical dopamine level in met/met individuals, confirms our expectation of a COMT Val158Met genotype modulation of the brain regions underlying inhibition efficiency. [less ▲]

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See detailHow tracer tests simulations strongly constrain flow and solute transport models in fractured chalk aquifers
Goderniaux, Pascal ULg; Daoudi, Moubarak; Orban, Philippe ULg et al

Conference (2012, May)

Flow and solute transport in the saturated zone of a micro-fissured and fractured chalk aquifer (Geer basin, Belgium) has been studied by more than 35 tracer tests in 11 sites. The tracer tests campaign ... [more ▼]

Flow and solute transport in the saturated zone of a micro-fissured and fractured chalk aquifer (Geer basin, Belgium) has been studied by more than 35 tracer tests in 11 sites. The tracer tests campaign was preceded by a morphostructural study associated to a geophysical survey including electrical resistivity and refraction seismic measurements. Results provided information on the main expected fracturation axis where a series of injection and monitoring wells were drilled. In each of the 11 sites, multi-tracer tests have been performed in groundwater convergent flow conditions to pumping wells or draining galleries (used for drinking water production). The analysis of the detailed quantitative breakthrough curves allowed identifying various transport behaviours, from rapid advective to dominant dispersive processes with immobile water effects. Groundwater flow and solute transport in such a fractured chalk can be simulated using different conceptual approaches. Using HYDROGEOSPHERE (Therrien and Sudicky, 1996), a comparison is made between two ways for representing the fracture zones: (1) high contrasted hydraulic conductivity zones with a classical REV approach and (2) the explicit representation of discrete fractures interacting with a porous medium. Promising results are found using the discrete approach for representing the fractures. In this last case, an aperture of the order of the millimetre is enough for creating, where it is needed, a fast advective peak combined with a long highly dispersive component due to the chalk matrix. The discrete fracture approach prevents the modeller from introducing unrealistic parameters values in the fracture zones as it is generally the case in the classical REV-based method where the fractured zones are simply represented by elongated REV. However, it is shown that the availability of field data, as multi-tracers test results, creates very high constraints to be taken into account in the calibration processes (i.e calibration on the measured groundwater flow and transport conditions). The detailed calibration on the different breakthrough curves is not an easy task and automatic calibration is not easy to organize. Results are particularly illustrative to show that a detailed parameterization and calibration of such a local situation remain difficult. Perspectives will be discussed about the potential use of automatic calibration tools as UCODE_2005 or PEST for solving such local situation models and the needed further steps for ‘upscaling’ local situation models at the scale of the whole aquifer or groundwater body. [less ▲]

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See detailLe droit électoral : régulation de l’accès au Parlement ?
Bouhon, Frédéric ULg

Conference (2012, May)

Malgré un développement considérable de la distribution du pouvoir depuis le début du 19ème siècle, notamment par l’extension progressive des droits électoraux et la rationalisation du découpage électoral ... [more ▼]

Malgré un développement considérable de la distribution du pouvoir depuis le début du 19ème siècle, notamment par l’extension progressive des droits électoraux et la rationalisation du découpage électoral, la législation électorale procure à un nombre restreint d’individus la possibilité d’exercer un contrôle sur l’accès au Parlement. Ce sont essentiellement les dirigeants des principaux partis politiques et les mandataires publics sortants (généralement issus de ces mêmes partis) qui bénéficient de ces moyens d’influencer le déroulement des élections. La démocratie représentative contemporaine est donc un régime politique qui assure une distribution régulée du pouvoir. Les règles de droit électoral jouent un rôle déterminant à cet égard en combinant la distribution d’une partie du pouvoir entre les mains des gouvernés et la concentration d’un reliquat (plus ou moins important) dans les mains d’un nombre limité d’individus. [less ▲]

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See detailGéologie appliquée au développement des nouvelles découvertes et aux nouveaux thèmes d’Exploration du Bassin de Berkine (Ghadamès, Algérie)
Djouder, Hocine ULg; Pagel, Maurice; Murat, Bruno et al

Conference (2012, May)

Durant de nombreuses années, les compagnies opérant au sein du Bassin de Berkine se sont focalisées sur les Formations gréseuses du Cambro-Ordovicien dans la partie Ouest, du Dévonien inférieur et du ... [more ▼]

Durant de nombreuses années, les compagnies opérant au sein du Bassin de Berkine se sont focalisées sur les Formations gréseuses du Cambro-Ordovicien dans la partie Ouest, du Dévonien inférieur et du Carbonifère dans le centre du bassin, ainsi que dans les séries triasiques sus-jacentes. Le Silurien était considéré comme un objectif secondaire puisque sa qualité de réservoir était négligée au profit de son potentiel de « roche mère ». En effet, la roche mère principale pour les réservoirs paléozoïques est issue des argiles radioactives siluriennes de base « hot shales » rencontrées à plus de 6000 m en profondeur. Le Bassin de Berkine, localisé dans le Sahara Oriental algérien, s‘étend sur près de 102 000 km². Au Paléozoïque inférieur, cette vaste étendue géographique était le siège d‘une sédimentation silicoclastique intracratonique puissante. Les sédiments siluriens se sont alors déposés dans un contexte d‘élévation globale du niveau marin relatif lié à la déglaciation tardi-ordovicienne. Les flux terrigènes prenaient alors leur source au sud du bassin. Deux zones sièges d‘une intense subsidence, le secteur de Menzel Lejmat et le Sillon de Marfag, présentent la série sédimentaire silurienne au complet. Deux entités sont alors mis en évidence, (I) les argiles principales (AP) à graptolites, et (II) les alternances gréso-argileuses (AGA) auxquelles sont rattachées les ensembles réservoirs M, A et B. Ces entités sont composées de 5 séquences principales, allant du Llandoverien au Pridolien, mises en évidence dans le système silurien du Bassin de Berkine. Ce découpage est le résultat d‘une analyse séquentielle haute résolution de deux coupes types (Puits MLEP-1 et BRD-5) basée sur l‘enchainement vertical des séquences sur diagraphies et carottes. Cette étude souligne le potentiel réservoir des unités argilo-gréseuses du Silurien terminal du Bassin de Berkine qui est clairement identifié dans des séquences deltaïques progradantes dans lesquelles les processus tidaux peuvent s‘exprimer. Cela suggère aussi des distributions complexes des objets réservoir et de leurs hétérogénéités réservoir qui restent à investiguer. [less ▲]

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See detailIntegrating tools, to approach the development of competencies
Poumay, Marianne ULg

Conference (2012, May)

The presentation will address the problem of integrating different tools in order to support competence development and evaluation amongst students in Higher Education. It will focus on students' self ... [more ▼]

The presentation will address the problem of integrating different tools in order to support competence development and evaluation amongst students in Higher Education. It will focus on students' self-regulation and discuss the difficulty of complementing low-level activities and spend more time with integrated ones,... towards the development of competences. [less ▲]

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See detailInverse dynamics of parallel kinematic manipulators with flexible links
Guimaraes Bastos Junior, Guaraci ULg; Seifried, Robert; Bruls, Olivier ULg

Conference (2012, May)

Detailed reference viewed: 38 (11 ULg)
See detailLe recouvrement de créances au sein de l'Union européenne
Berthe, Aude ULg

Conference (2012, May)

Detailed reference viewed: 36 (2 ULg)
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See detailBronze Age Domestic Architecture in Eastern Syria : Familiar, Social and Economic Implications
Mas, Juliette ULg

Conference (2012, May)

This paper dealt with a PhD project on domestic architecture and society on the Syrian Euphrates region and in the Jezirah during the Bronze Age. The large geographical and chronological framework allowed ... [more ▼]

This paper dealt with a PhD project on domestic architecture and society on the Syrian Euphrates region and in the Jezirah during the Bronze Age. The large geographical and chronological framework allowed to collect an important corpus of houses. The analysis of statistical data on their different features allowed interpretations, in particular concerning their functionnal characteristics. The attention is here focused on the crafts and industrial production of the house inhabitants. The contemporary economic system is well known in Southern Mesopotamia, and was there mainly based on official oikoi linked to the temples or to the palace. On the contrary, the analysis of Northern Mesopotamian evidence shows that the economic system in this area was mainly based on private households, the state control probably being there of lesser importance. [less ▲]

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See detailInfluence of Cocoa Butter Diacylglycerols on the Isothermal Crystallization of Cocoa Butter
DeClercq, Nathalie; Danthine, Sabine ULg; Dewettinck, Koen

Conference (2012, May)

Detailed reference viewed: 37 (5 ULg)
See detailUne image moderne de la régénération osseuse
LAMBERT, France ULg

Conference (2012, May)

Detailed reference viewed: 11 (0 ULg)
See detailThe added value of triple frequency GNSS for TEC reconstruction
Warnant, René ULg; Spits, Justine

Conference (2012, May)

Detailed reference viewed: 43 (3 ULg)
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See detailEvolution de la répartition de la loutre d'Europe (Lutra lutra) au Maroc
Libois, Roland ULg; Rosoux, René; Fareh, Mostafa

Conference (2012, May)

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See detailTime controlled Cryogenic Zone Compression (timed CZC) GC-HRMS: a Novel Tool for Human Biomonitoring?
Krumwiede, D; Mehlmann; Focant, Jean-François ULg et al

Conference (2012, May)

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See detailSharing representations in distant synchronous collaborative design : framework, technological proposal and scientific issues.
Safin, Stéphane ULg

Conference (2012, May)

This chapter addresses the issue of sharing in collaborative design by the use of an original system developed in the LUCID-ULg Lab. The Distributed Collaborative Design Studio (DCDS) is a remote ... [more ▼]

This chapter addresses the issue of sharing in collaborative design by the use of an original system developed in the LUCID-ULg Lab. The Distributed Collaborative Design Studio (DCDS) is a remote workspace environment aiming to emulate, at a distance, the conditions of face-to-face meetings. It is designed to allow designers to interact collaboratively at distance on a shared workspace, thanks to «natural» pen-based interaction. This documents sharing and real-time collaborative annotations are supposed to enhance awareness and grounding dur- ing collaboration in design domains. In this chapter, we explicit the theoretical rationale for sharing in collaborative design, briefly describe the DCDS, summarize the observations we made relative to resources sharing (plans, pictures, documents and so on), and conclude on the theoretical and methodological issues to be addressed to deepen our knowledge about sharing external representations in design, to enhance the system and to adapt it to other contexts. [less ▲]

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See detailGC×GC-TOFMS for the comparison between different tobacco mainstream smoke
Brokl, Michal ULg; Bishop, L; Wright, C et al

Conference (2012, May)

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See detailImplementing a National Routine Genetic Evaluation for Milk Fat Compositions as First Step Towards Genomic Predictions
Gengler, Nicolas ULg; Troch, Thibault ULg; Vanderick, Sylvie ULg et al

Conference (2012, May)

Currently the Walloon Region of Belgium is one of the first regions in the World where mid-infra red (MIR) spectral data is recorded in routine for nearly all cows under milk recording. Based on this data ... [more ▼]

Currently the Walloon Region of Belgium is one of the first regions in the World where mid-infra red (MIR) spectral data is recorded in routine for nearly all cows under milk recording. Based on this data, in some herds collected since 2007, saturated (SFA) and monounsaturated fatty acid (MUFA) contents in milk are predicted for each test-day. Together with correlated traits as milk, fat and protein yields, estimated breeding values (EBV) are now computed in routine for SFA and MUFA starting in June 2012. A total of 499 821, 392 255, 277 465 fatty acid records were available in first, second and third lactation for this run. A restricted selection index, called NQI (nutritional quality index) was developed that puts a negative weight on SFA, a positive weight on MUFA and restricts changes in milk and fat yields to zero. By using this index for a constant fat content, milk fat will be selected to be less saturated with a high contribution from MUFA. Based on this system a single-step genomic evaluation is under development including the introduction of MACE breeding values for correlated traits. The final step is to offer for owners of genotyped animals, a service to provide them with genomically enhanced NQI. Similar systems are under development in Wallonia for other novel traits (e.g., methane emissions) based on the ability to predict them from MIR spectral data. [less ▲]

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See detailSea ice as a source of bioavailable iron to the Southern Ocean
Schoemann, Véronique; Lannuzel, Delphine; de Jong et al

Conference (2012, May)

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See detailChaque étudiant de master est-il capable d'auto-évaluer efficacement ses ressources, dans le cadre d'une approche par compétences ?
Sadzot, Agnès ULg; Poumay, Marianne ULg; Maillart, Christelle ULg

Conference (2012, May)

La communication expose les résultats issus de la comparaison entre performance réelle des étudiants et auto-évaluation de celle-ci. Elle tente de répondre aux questions de recherche suivantes : l ... [more ▼]

La communication expose les résultats issus de la comparaison entre performance réelle des étudiants et auto-évaluation de celle-ci. Elle tente de répondre aux questions de recherche suivantes : l'étudiant est-il capable de s'autoévaluer efficacement ? Sont-ce véritablement les meilleurs étudiants qui s'autoévaluent le mieux ? Les étudiants s'améliorent-ils en cours d'année ? Observe-t-on des différences en termes d'auto-évaluation selon le type de ressources évaluées (savoir versus savoir-faire) ? Elle discute ensuite des pistes de régulation du Master (orthophonie, ULg) issues de cette étude. [less ▲]

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See detailBioanalytical Applications of GCxGC-TOFMS for VOC Analyses
Focant, Jean-François ULg

Conference (2012, May)

Detailed reference viewed: 34 (4 ULg)
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See detailPostérités et paradoxes de la physiognomonie. Introduction
Stienon, Valérie ULg; Wicky, Érika

Conference (2012, May)

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See detailLARGE PENETRATION OF DISTRIBUTED PRODUCTIONS: DYNAMIC LINE RATING AND FLEXIBLE GENERATION, A MUST REGARDING INVESTMENT STRATEGY AND NETWORK RELIABILITY
Schell, Peter; Lilien, Jean-Louis ULg; Nguyen, Huu-Minh ULg et al

Conference (2012, May)

Dynamic Line Rating (DLR), a.k.a determining the maximum rating of overhead lines based on real-time weather parameters has the potential to significantly increase the power transport & distribution ... [more ▼]

Dynamic Line Rating (DLR), a.k.a determining the maximum rating of overhead lines based on real-time weather parameters has the potential to significantly increase the power transport & distribution capacity of the grid in favorable weather conditions. Combining active network management (curtailable generation) with DLR as trigger offers a solution out-there for the <br />system operator that combines technical feasibility, adequate implementation timing and economic viability. Flexible generation being already in use on the ELIA network, the potential benefits of using it in conjunction with DLR will be analyzed. [less ▲]

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See detailEtude du régime alimentaire et la stratégie trophique saisonnière de la loutre d'Europe (Lutra lutra) sur l'oued Beht (Maroc)
Fareh, Mostafa; Libois, Roland ULg; Gmira, Najib et al

Conference (2012, May)

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See detailThe impact of aging and hearing status on verbal short-term memory
Verhaegen, Clémence ULg; Collette, Fabienne ULg; Majerus, Steve ULg

Conference (2012, May)

We determined the impact of hearing status on age-related effects on verbal short-term memory (STM). Rabbit (1991) observed that elderly participants with hearing loss show impaired STM; he suggested that ... [more ▼]

We determined the impact of hearing status on age-related effects on verbal short-term memory (STM). Rabbit (1991) observed that elderly participants with hearing loss show impaired STM; he suggested that in the case of hearing loss, attentional resources had to be recruited to a larger extent to stimulus perception, reducing the available pool of attentional resources for STM processing. We tested this hypothesis by distinguishing the impact of aging from the impact of hearing status on STM. This was done by administering different verbal STM tasks to elderly and young adult participants matched for hearing threshold, as well as normal-hearing control participants. We observed that elderly participants and hearing-matched young participants showed equal levels of performance in all verbal STM tasks, and performed overall more poorly than the normal-hearing young control participants. These results suggest that mild hearing impairment is a major explanatory factor of reduced STM performance, and importantly, is age-independent. The results are discussed within an interactive framework of STM and attentional processing (Majerus et al., 2009). [less ▲]

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See detailInfluence of monopalmitin on the crystallization behaviour of palm oil
Verstringe, Stefanie; Danthine, Sabine ULg; Depypere, Frederic et al

Conference (2012, May)

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See detailUne montagne d’or, c’est bien conçu, mais ce n’est pas donné
Leclercq, Bruno ULg

Conference (2012, April 30)

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See detailLes contenus perceptuels et leurs parties
Dewalque, Arnaud ULg

Conference (2012, April 30)

My goal is to construe a plausible approach in favor of the existence of nonconceptual perceptual contents. I suggest that the most promising way of reaching this goal is to construe perceptual contents ... [more ▼]

My goal is to construe a plausible approach in favor of the existence of nonconceptual perceptual contents. I suggest that the most promising way of reaching this goal is to construe perceptual contents as multi-level contents or as contents involving nonconceptual components. In this talk I confront this view with the so-called perceptual conceptualism. [less ▲]

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See detailConcepts, inférences et expérience perceptive
Zincq, Aurélien ULg

Conference (2012, April 30)

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See detailNutritional vitamin D in CKD patients
CAVALIER, Etienne ULg

Conference (2012, April 28)

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See detailLa famine Ruzagayura (Rwanda, 1943-1944): causes, conséquences et réactions des autorités. Présentation des résultats de recherche
Singiza, Dantès ULg

Conference (2012, April 27)

La présente intervention revient sur le thème traité dans notre mémoire de Master en histoire, à savoir la famine Ruzagayura de 1943-1944, au Rwanda. Dans notre mémoire et dans la présente communication ... [more ▼]

La présente intervention revient sur le thème traité dans notre mémoire de Master en histoire, à savoir la famine Ruzagayura de 1943-1944, au Rwanda. Dans notre mémoire et dans la présente communication, nous tentons d’y répondre aux principales questions que pose cette famine : quelles en furent les causes, le domaine d’extension, la durée et les conséquences à court et moyen terme ? Quelles furent les réactions des différentes autorités, locales et mandataires, mais également des missionnaires face à cette situation d’urgence ? [less ▲]

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See detailUne nouvelles approche implantaire pour traiter les agénésies
LAMBERT, France ULg

Conference (2012, April 26)

Les agénésies dentaires sont fréquentes et représentent une prévalence de 5 %. Le remplacement de ces dents manquantes avec des implants est aujourd’hui appliqué en routine avec des protocoles ... [more ▼]

Les agénésies dentaires sont fréquentes et représentent une prévalence de 5 %. Le remplacement de ces dents manquantes avec des implants est aujourd’hui appliqué en routine avec des protocoles chirurgicaux de moins en moins invasifs. Cependant, avant le placement des implants, une alternative transitoire est nécessaire jusqu’à la fin de la croissance. Une solution récemment introduite est l’utilisation des implants provisoires de faible diamètre. L’objectif de cet exposé est de décrire le protocole de traitement des implants provisoires ainsi que la gestion définitive de ces cas avec des techniques chirurgicales peu invasives. [less ▲]

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See detailRégionalisation des débits d'étiage en Région wallonne
Gailliez, Sébastien ULg; Grandry, Maud ULg; Verstraete, Arnaud et al

Conference (2012, April 26)

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See detailDietary and urinary excretion of sodium and potassium associated with blood pressure control in treated hypertensive kidney transplant patients
Saint-Remy, Annie ULg; SOMJA, Mélanie ULg; BONVOISIN, Catherine ULg et al

Conference (2012, April 26)

Abstract Background. In kidney transplant (kt) recipients , hypertension is a major risk for cardiovascular complications but also for graft failure. Blood pressure (BP) control is therefore mandatory ... [more ▼]

Abstract Background. In kidney transplant (kt) recipients , hypertension is a major risk for cardiovascular complications but also for graft failure. Blood pressure (BP) control is therefore mandatory. Office BP (OBP) remains the most frequently used for clinical decisions, however home BP (HBP) have brought a significant improvement in the BP control. Sodium is a modifiable risk factor, many studies accounted for a decrease of BP with a sodium restricted diet. Increased potassium intake has been also recommended in hypertension management. Using an agreement between office and home BP, the present study investigated the relations between the BP control in kt recipients and their urinary excretion and dietary consumption of sodium and potassium. Methods. The BP control defined by OBP <140/90 mmHg and HBP <135/85 mmHg was measured in 70 kt recipients (mean age 56 ± 11.5 years; mean graft survival 7 ± 6.6 years) treated with antihypertensive medications. OBP and HBP were measured with a validated oscillometric device (Omron M6â). 24-hour urinary sodium (Na+) and potassium (K+) excretion as well as dietary intakes (food recall) were compared between controlled and uncontrolled (in office and at home) recipients. Non parametric Wilcoxon Mann-Whitney Test was used for between groups comparisons and Fisher’s exact test for frequencies comparisons. Results. Using an agreement between OBP and HBP, we identified controlled (21%) and uncontrolled recipients (49%). Major confounding effects susceptible to interfere with the BP regulation did not differ between groups, the amounts of sodium excretion were similar (154 ± 93 vs 162 ± 88 mmol/24h) but uncontrolled patients excreted less potassium (68 ± 14 vs 54 ± 20 mmol/24h; P=0.029) and had significantly lower intakes (3279 ± 753 vs 2208 ± 720 mg/24h; P=0.009), resulting in a higher Na+/K+ ratio. Systolic HBP was inversely and significantly correlated to urinary potassium when age, BMI and urinary sodium were controlled (r= -0.46; P=0.002). When age, BMI and urinary potassium were controlled, a positive relation was observed with urinary sodium (P=0.042). Conclusions. Half of the treated hypertensive kt recipients remained uncontrolled in office and at home. Restoring a well-balanced sodium/potassium ratio intakes could be a non pharmacological opportunity to improve blood pressure control. [less ▲]

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See detailLes élections en débat : introduction et présentation du colloque
Bouhon, Frédéric ULg; Reuchamps, Min ULg

Conference (2012, April 26)

Quelles sont les règles et les pratiques électorales en Belgique ? Nul n’ignore l’importance des élections dans toute société démocratique. Or, les élections reposent sur un système électoral qui n’est ... [more ▼]

Quelles sont les règles et les pratiques électorales en Belgique ? Nul n’ignore l’importance des élections dans toute société démocratique. Or, les élections reposent sur un système électoral qui n’est jamais neutre. En Belgique, des élections sont organisées à différents niveaux (élections communales, provinciales, régionales, communautaires, fédérales et européennes) et chaque type d’élection est encadré par un système électoral qui lui est propre. Il est donc nécessaire de mettre en perspective les nombreuses règles et pratiques électorales de notre pays. Entre les interventions de juristes et de politologues, ce colloque fera la part belle à la discussion avec le public. En outre, cet aprèsmidi de débats se fondera sur les travaux de plus de trente auteurs rassemblés dans l’ouvrage Les systèmes électoraux de la Belgique et publié sous la direction de Fr. Bouhon et M. Reuchamps (Éd. Bruylant). Le colloque s’articulera autour de trois grandes thématiques : - le concept de démocratie représentative ; - les acteurs des élections ; - le mode et les modalités de scrutin [less ▲]

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See detailStress oxydant, anti-oxydants et vieillissement
Pincemail, Joël ULg; Petermans, Jean ULg

Conference (2012, April 26)

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See detailReimbursement of radiotherapy in Belgium
JANSEN, Nicolas ULg

Conference (2012, April 26)

The author gives an overview of the proposals for a new reimbursement system for radiotherapy in Belgium, to be possibly introduced in 2013.

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See detailChangements dans l’art de construire: le choix des matériaux
Courard, Luc ULg

Conference (2012, April 25)

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See detailTraffic Situation Assessment and Intervention Strategy of a Collision Avoidance System based on Galileo Satellite Positioning
Christen, Fréderic ULg; Ewald, Christian; Eckstein, Lutz et al

Conference (2012, April 25)

Nowadays, collision avoidance systems (CAS) are an intensive research topic since the majority of all traffic accidents are collisions that are caused due to inattention or unadjusted driving behavior of ... [more ▼]

Nowadays, collision avoidance systems (CAS) are an intensive research topic since the majority of all traffic accidents are collisions that are caused due to inattention or unadjusted driving behavior of the driver. Up to date prototypic CAS are based on on-board environmental sensors, such as camera or radar systems, that scan the vehicle's surrounding environment in order to assess the situation's hazardousness. The functionality of the used sensors under varying environmental conditions and the limited sensor covering area require an enormous effort to ensure a reliable detection of obstacles, and thus limit the application of the systems. In order to expand the operating field of such systems, a Galileo-based CAS will be developed within the project ‘Galileo above’ (application centre for ground based traffic). This advanced driver assistance system (ADAS) detects surrounding vehicles that are on collision course and reacts autonomously, if the driver does not intervene to avoid the crash. For this purpose the system initiates an emergency stop and/or an emergency steering maneuver. For the development of the CAS the Galileo test centre automotiveGATE in Aldenhoven, Germany will be used. On this test area pseudolites will be installed which provide Galileo-like navigation signals. Thus, the development respectively tuning of Galileo-based vehicle systems will be enabled, so as to have them available on the market when the Galileo satellite system reaches its full operational capability (FOC). The focus of this paper is on the traffic situation assessment and intervention strategy of the CAS. This includes the perception and analysis of the driving situation, the detection of potential collision situation, the definition of an adequate system reaction and the planning of an evasion trajectory. Furthermore, an outlook on the model predictive control for longitudinal and/or lateral control (braking and/or steering maneuver) will be presented. [less ▲]

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